1) ĐỀ THI HỌC KỲ I VỀ PHƯƠNG TRÌNH LƯỢNG GIÁC LỚP 11 NH ...
1) THI HC K I V PHNG TR?NH LNG GI?C LP 11 NH 2019-2020
C?u 1: (THPT MARIE CURIE) Gii phng tr?nh: cos 5x sin x 0 .
C?u 2: (THPT V? VN KIT) Gii c?c phng tr?nh sau:
a) 2sin x 1 0
b) 3 cos x sin x 2 0
c) cos x cos 2x cos3x cos 4x 0
d)
sin
x
4
1
sin
x
cos
2
x
1
1 tan x
cos x
2
C?u 3 : (THPT NGUYN HU TH) Gii c?c phng tr?nh sau:
a)
sin
2x
3
1 2
.
Phng
tr?nh
?
cho
c?
bao
nhi?u
nghim
trong
khong
(?3
;
1)
?
b) cos 2x 3sinx + 4 = 0
C?u 4 : (THPT B?I TH XU?N) Gii phng tr?nh: 2sin2 x 2 3 sin xcos x 4cos2 x 1 0 .
C?u 5 : (THPT CHUY?N L? HNG PHONG) Gii c?c phng tr?nh sau:
a)
cos
x
3
3. 2
b) 2sin2 x 3sin 2x 6cos2 x 1
C?u
6
:
(THPT
PHM
PH?
TH)
Gii
phng
tr?nh
sau:
cos
3
2x
3
sin
3
2
x
2.
C?u 7 : (THPT NGUYN KHUYN) Gii phng tr?nh sin 2x 3 cos 2x 2sin 3x.
C?u 8 : (THPT B?NH PH?) Gii c?c phng tr?nh sau: a) sin2x cosx 0 b) 2sin2 x 5sin x cos x 3cos2 x 2 c) cos2 2x cos2 5x sin2 4x sin2 3x
C?u 9 : (THPT L? QU? ?N) Gii phng tr?nh sau: 3 sin 2 x+ 2 cos2x = 2 .
C?u 10 : (THPT NAM K KHI NGHA) Gii c?c phng tr?nh: a) 2sin2x 5cosx 5 0 b) sin 2x sin x 2cos x 1 0
C?u 11 : (THTH S?I G?N) Gii c?c phng tr?nh sau: a) 2sin2 x cos x 1
b) sin 2x 3 cos 2x 2cos x
C?u 12 : (THPT CHUY?N TRN I NGHA) Gii phng tr?nh: 4sin x.cos x 2sin x 2 3 cos x 3 0 .
C?u
13
:
(THPT
TRN
PH?)
Gii
phng
tr?nh
lng
gi?c
sau:
sin
2
x 2
2
cos
2
x 4
3 4
0
C?u 14 : (THPT NGUYN HIN) Gii c?c phng tr?nh sau: a) 2sin2x 3 b) 2cos2 x 3cos x 2 0
c) 3 sin x cos x 2sin x
C?u 15 : (THPT NGUYN TH MINH KHAI) Gii c?c phng tr?nh sau: a) sin x cos x 1. b) sinx.cos x sin x cos x 1.
C?u 16 : (THPT LNG TH VINH) Gii c?c phng tr?nh sau: 3 sin2 x sin x.cos x 3 .
C?u 17 : (THPT NGUYN TT TH?NH) Gii c?c phng tr?nh sau:
a) 2sin2x 3 1 0
b) 2sin2 x 5cos x 4 0 c) sin xsin 2x cos xcos2x sin 6x 0.
C?u 18 : (THPT TRN KHAI NGUY?N) Gii c?c phng tr?nh:
a)
2
cos2
x
7
9
cos
x
7
11
0
b)
3
sin
3x
3
cos
3x
3
2
C?u 19 : (THPT MC NH CHI)
1) Lp bng bin thi?n ca h?m s y sin x tr?n on ; .
2) Gii c?c phng tr?nh:
a) sin 2x 1 2cos x 3 0 .
b) cos4 x sin4 x 3 sin 2x 2 0 . 2cos x 1
C?u 20 : (THPT TRNG VNG) Gii c?c phng tr?nh lng gi?c: a) 3cos x 2sin2 x 0
b) sin 5x 3 cos5x 1.
C?u 21 : (THPT TRN KHAI NGUY?N) Gii c?c phng tr?nh:
a)
2
cos2
x
7
9
cos
x
7
11
0
b)
3
sin
3x
3
cos
3x
3
2
C?u 22 : (THPT B?NH T?N)
1)
T?m
tp
x?c
nh
ca
c?c
h?m
s
sau:
y
cotx
3
2) Gii c?c phng tr?nh sau:
a)
2 sinx
3
3 0.
.
2 2 cos 3x
b) 2cos2x 2 sin x 2 0 .
C?u 23 : (THPT B?NH CH?NH) Gii c?c phng tr?nhsau:
1) cos2x 3sin x 2 0
2) sin 2x 3 cos 2x 2
C?u 24 : (THPT SNG NGUYT ANH) Gii c?c phng tr?nh lng gi?c sau: a) 3 sin 2x cos 2x 2 0
b) 2cos2 x 3sin 2x sin2 x 10 c) tan 2x sin 2x cos 2x 10
C?u 25 : (THPT TRN QUANG KHI) Gii c?c phng tr?nh lng gi?c sau : a) cos x 3 sin x 1 b) 1 sin x cos x sin 2x cos 2x 0
C?u 26 : (THPT NGUYN DU) Gii c?c phng tr?nh lng gi?c sau : a) cos2 x 3cos x 2 0 b) sin x 3 cos x 1 0
C?u 27 : (PTNK TP.HCM) Gii c?c phng tr?nh lng gi?c sau : a) sin 3x 3 cos3x 2(cos2 x sin2 x) b) sin 2x 2sin 2x cos 4x 1
cos 3x
2) THI HC K I V PHNG TR?NH LNG GI?C LP 11 NH 2020-2021
C?u 28 : (THPT PHM PH? TH) Gii c?c phng tr?nh lng gi?c sau : Gia?i ca?c ph??ng tr?nh sau: a) cos 2x 5sin x 2 0 b) 3 sin 3x cos3x 2
C?u 29 : (THPT B?NH PH?) Gia?i ca?c ph??ng tr?nh sau: a) cos2 x 2cos x
b) sin x sin x cos x cos 2x 0
C?u 30 : (THPT NAM K KHI NGHA) Gia?i ph??ng tr?nh: cos 2x 5cos x 3 0
C?u 31 : (THPT NGUYN TT TH?NH) Gia?i ca?c ph??ng tr?nh sau:
a)
2
sin
2x
3
1
0
b) tan2 x 1 1 0 cos x
c)
cos2
x
4
cos
2
2x
1
C?u 32 : (THPT MC NH CHI) Gia?i ca?c ph??ng tr?nh l???ng gia?c sau:
a) 2 sin x 1 2cos2 x cos x 1 0
b) sin 2x 3 cos 2x 2sin x
c)
sin
2x
3
3 2
cos
2x
cos2
x
sin
x
4
C?u 33 : (THPT CHUY?N L? HNG PHONG) Gia?i ca?c ph??ng tr?nh sau:
a)
2
cos
2x
4
3
b) 3 sin x cos x 2
C?u 34 : (THPT CHUY?N TRN I NGHA) Gia?i ph??ng tr?nh: 4sin x cos x 2sin x 2 3 cos x 3 0
C?u 35 : (THPT L? QU? ?N) Gia?i ph??ng tr?nh sau: 5sin2 x 2 3 sin x.cos x 3cos2 x 2
C?u 36 : (THPT TRN PH?) Gia?i ph??ng tr?nh l???ng gia?c sau: 6sin 2x cos x 3 3 cos x 10sin 2x 5 3
C?u 37 : (THPT NGUYN TH MINH KHAI) Gia?i ca?c ph??ng tr?nh: a) 2sin2 x sin x 1 0 b) 2cos x sin 3x sin 2x 0
C?u 38 : (THPT NGUYN DU) Gia?i ca?c ph??ng tr?nh sau: a) sin2 x 3sin x 2 0 b) 3 sin x cos x 2
C?u 39 : (THPT TRN HNG O) Gia?i ca?c ph??ng tr?nh sau:
a) cos 4x 4sin 2x 5 0
b)
cos
2x
3
sin
x
0
C?u 40 : (THPT LNG VN CAN) Gia?i ca?c ph??ng tr?nh sau:
a)
tan
x
3
30
b) cos2 2x sin 2x 1 0
c) sin 2x cos 2x sin 3x cos3x 0
C?u 41 : (THPT MARIE CURIE) Gia?i ph??ng tr?nh: cos 2x 2cos x 3 0
C?u 42 : (PTNK TP.HCM) Gia?i ca?c ph??ng tr?nh sau: a) cos 2x 6sin x 7 0
b) 1 tan x 2 2 sin x c) 3cos 4x sin2 2x cos 2x 2 0
C?u 43 : (THPT T?N T?C) Gia?i ph??ng tr?nh: a) 3tan 2x 3 0 b) cos x 3 sin x 2 c) 6cos2 x 5sin x 2
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